Never done it, but it says you can put it in by vac or into the air intake system. I would stick to the vac. Seems to be the easiest way. I don't know how you would pour it into the throttle body? Got some today and going to try to do it at lunch tomorrow if it isn't rainiing. Wish I would have picked up two cans. Says 1/3 goes into the vac line, 1/2 into the crank, and 1 can into a tank of gas. Gonna need another can. Checking my math, that is over 2 cans, but I think a little less in the tank will be ok.